POSITIVE ELECTRODE ACTIVE MATERIAL FOR NONAQUEOUS ELECTROLYTE SECONDARY BATTERIES, AND NONAQUEOUS ELECTROLYTE SECONDARY BATTERY

摘要

This positive electrode active material for nonaqueous electrolyte secondary batteries contains: first particles which have an average surface roughness of 4% or less and are mainly configured of a lithium-nickel composite oxide wherein the ratio of Ni relative to the total number of moles of metal elements other than Li is more than 30% by mole; and second particles which are present on the surfaces of the first particles and are mainly configured of at least one hydroxide selected from among hydroxides of lanthanoid elements (excluding La and Ce) and oxyhydroxides.

主权项

1. A positive electrode active material for nonaqueous electrolyte secondary batteries comprising:
first particles containing, as a main component, a lithium-nickel composite oxide wherein the percentage of Ni relative to a total number of moles of a metal element other than Li is more than 30% by mole, and having an average surface roughness of 4% or less; and second particles containing, as a main component, at least one selected from a hydroxide and an oxyhydroxide of a lanthanoid element (excluding La and Ce), and present on surfaces of the first particles.